how to add my own funtion into a library

This is a discussion on how to add my own funtion into a library within the Tech Board forums, part of the Community Boards category; hi there ,
my name is nitin, i am quite new to programming and just started of with c programing.
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how to add my own funtion into a library

hi there ,
my name is nitin, i am quite new to programming and just started of with c programing.
i was doing some programs on recursive functions when i came across the part where
it said the i could reduce the compilation time of my program if i added my own function
to an already existing library such as math.lib.
i am using tc201 compiler.
this is what i had done
1,i made a function definition of my function i wanted to add in a file of .c extention,.
2.compiled the file ,it creats FILENAME.OBJ file.
3.add function to the library c:\>tlib math.lib+c:\FILENAME.obj
4.declared its prototype in a FILENAME.H file.
5.wrote a program to use the function ,#included the FILENAME.H as the url in double quotes.

now to the problem. when i compiled it gave me no error. but when i tried to run it gave me a linker error.

does this mean that my function that i tried to add didn't get added to the lib ??
please help.